Terms containing free line

Subject	English	Chinese
avia.	cloud free line of sight	无云视线
earth.sc.	cloud-free line-of-sight	无云视线
el.	free line	空闲线
textile	free line	自由型
tech.	free line	空线
gen.	free line	空闲线
tech.	free line net	自由式路网
tech.	free line signal	空线信号
IT	free line signaling	空线信号
el.	free line trunk	空闲中继线
el.	loss-free line	无损耗输电线
oil	loss-free line	无损耗传输线
tech.	loss-free line	无损耗线
telecom.	noise-free line printer	无噪声行式打印机
telecom.	successive search for a free line	逐次搜寻空闲线路
agric.	virus-free line	无病毒系